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Tangent from an external point
Author:
jaycheung2016plk
GeoGebra
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兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
錐體建築師
四邊形的特性
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圓和弦圓和弦
繡曲線
向量座標
四面体棱锥外接球
判斷球體
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Trapezoid
Limits
Distributions
Perimeter
Derivative